Electric conductor.



W. C. HAYMAN.

ELECTRIC CONDUCTOR.

APPLiCATION FILED MAR. 9. 1916.

1,267,868; Patented May 28,1918.

Inventor: WiHiarn C. Hal man,

His JTtiorneg UNITED STATES PATENT OFFICE.

WILLIAM C. HAYMAN, OF SCHENECTADY, NEW YORK, ASSIGNOR TO GENERAL ELEC- TRIC COMPANY, A CORPORATION OF NEW YORK.

ELECTRIC CONDUCTOR.

Specification of Letters Patent.

To all whom it may concern:

Be it known that I, WILLIAM C. HAYMA'N, a citizen of'the United States, residing at Schenectady, in the county of Schenectady, State of New York, have invented certain new and useful Improvements in Electric Conductors, of which the following is a specification.

The present invention relates to insulated electric conductors having coverings which are-provided with one or more colored marking threads, which thread or threads may be raised or not as found desirable. The invention relates particularly to conductors which are covered on the outside with a braiding. It has heretofore been customary in connection with such conductors to braid a marking thread into the covering by using a dyed thread of distinctive color on one of the bobbins on the braiding machine, such thread being of the same size, or a slightly larger size, than the others, the latter arrangement giving a raised marking thread. With such an arrangement it has been found that the saturating water proofing compound, which is usually black in'color, and which is applied after the braiding operation is completed, discolors the markin thread to such an extent that it is often di cult, if not impossible to distinguish it.

I have discovered that this difiiculty can be overcome by utilizing in place of a dyed marking thread, a thread impregnated with a filler which renders the threadimpervious to the saturating water proofing compound, as for example, a thread filled with a colored wax or paint, such filler, as the colored wax or paint, being applied to the thread before it is braided. By-this arrangement I have found that the saturating compound will not discolor the marking thread.

My invention is applicable to a single conductor intended for use by itself, or to a cable made up of two or more conductors,

one or more of which are provided with a marking thread.

The accompanying drawing illustrates a cable embodying my invention, a cable comprising two conductors being shown.

Referring to the drawing, 1 and 2 indicate the two conductors of a cable 3. The wire of each conductor may be first suitably covered with one or more iayers of insulation, as rubber, after which the braided covering 4 is put on. The conductors may then be and covered with a braiding 5 as indicated in the drawing, or formed into a cable in any other suitable manner. In the conductor 2 is a marking thread 6 which, in accordance with my invention, is a thread which prior to braiding has been impregnated with a filler, as a colored wax orpaint of suitable composition.

In accordance with the provisions of the patent statutes, I have described the princi le of operation of my invention, together with the apparatus which I now consider to represent the best embodiment thereof; but I desire to have it understood that the apparatus shown is only illustrative and that the invention can be carried out by other means.

What I claim as new and desire to secure by Letters Patent of the United States, is

1. A conductor having a covering treated with a saturating water proofing compound, said .covering comprising a marking thread which previous to being applied to the conductor has been impregnated with a filler of distinctive color which renders the thread impervious to the saturating compound whereby the distinctive coloring of the marking thread will not be obliterated by the saturating compound.

2.'The combination in a cable, of a conductor having a covering treated with a sat urating water proofing compound, said covering comprising a marking thread which previous to being applied to the conductor has been impregnated with a filler of distinctive color which renders the thread impervious to the saturating compound whereby the distinctive coloring of the marking thread will not be obliterated by the saturating compound.

3. In a cable comprising a pluralityv of conductors having braided coverings which, after the braided coverings have been applied, is treated with a saturatlng water proofing compound, a marking thread braided into the covering of one of the conductors,

Patented May 28, 1918.

suitably twisted together, or laid side by side 4. In a cable comprising a plurality of the marking thread impervious to the satconductors having braided coverings which urating compound whereby the distinctive are saturated with a water proofing com coloring of the 'marking thread will not be 10 pound, a marln'ng thread braided into the obliterated by the saturating compound.

5 covering of one of said conductors, which In witness whereof, I have hereunto set thread 1s impregnated with paint of a dismy hand this 8th day of March 1916. tinctive color, said paint serving to render WILLIAM C. HAYMAN. 

